If you understood wrestling, you would know that it is very difficult to avoid going backwards, when someone has both arms clamped, outweighs you by 40-50 lbs, and just pushes. I thought Schafer did an admirable job most of the time to circle in. I think Schafer deserved a warning, and maybe one stall point. But so did Stoll....
Your concept of stalling is so f'ed up, even your homer ref disagrees with you. Also, weight has nothing to do with it. They are both in the same weight class. Stoll has a bad knee. Should the ref feel sorry for him?